EcoRRAP Habitat Complexity Metrics

The current habitat complexity metrics are extracted from 3D digital surface models (DSMs) of benthic communities at EcoRRAP study sites. DSMs are generated from raw imagery collected by divers (see SOP: AIMS_EcoRRAP_SOP14_V1_FIeld-Photogrammetry4D_Overview-infield-workflow_2024Update.pdf) and processed using photogrammetry software Agisoft Metashape (see SOP: AIMS_EcoRRAP_SOP16_V1_Field-Photogrammetry4D_3D-Model-Processing_2023_06.2025.pdf) and are available here: EcoRRAP Digital Surface Models - AIMS. Habitat complexity metrics are extracted from DSMs using 'metricsCalc' and 'complexitymetrics' tools developed by Ryan Krensel, Mitch Bryson and Will Figueira from the University of Sydney. A total of 38 habitat complexity metrics are generated for each DSM and include 2D and 3D measurements of model surface area, volume, rugosity, and a range of other structure metrics. Metric definitions are provided in the attached metadata documents.本研究中的栖息地复杂度指标提取自EcoRRAP研究样地底栖生物群落的3D数字表面模型（3D digital surface models, DSMs）。上述DSMs由潜水员采集的原始影像生成，相关生成流程详见标准作业程序（Standard Operating Procedure, SOP）文档AIMS_EcoRRAP_SOP14_V1_Field-Photogrammetry4D_Overview-infield-workflow_2024Update.pdf；其后续处理则通过Agisoft Metashape摄影测量软件完成，具体操作规范详见标准作业程序（Standard Operating Procedure, SOP）文档AIMS_EcoRRAP_SOP16_V1_Field-Photogrammetry4D_3D-Model-Processing_2023_06.2025.pdf。相关DSMs数据集可通过以下途径获取：EcoRRAP Digital Surface Models - AIMS。栖息地复杂度指标通过悉尼大学Ryan Krensel、Mitch Bryson与Will Figueira开发的`metricsCalc`与`complexitymetrics`工具从DSMs中提取得到。每个DSM共生成38项栖息地复杂度指标，涵盖模型表面积、体积、地表粗糙度（rugosity）以及一系列其他结构指标的二维与三维测量值。各项指标的详细定义详见随附的元数据文档。